4.6 Newly Instantiated UI Prefabs Are Not Visible?

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I'm trying to create button prefabs for some of my UI buttons and icons, however whenever I instantiate a new one from a prefab it's completely invisible.

If I drag and drop the prefab in the editor onto the scene it also goes in as invisible. Though, if I drag and drop it into the hierarchy under the panel it's supposed to sit under it shows up like normal. If I take the "invisible" object and drag it in the hierarchy under the appropriate parent it continues to be invisible. The same thing happens if I instantiate the object in code, and then assign it's parent to the appropriate panel via code, it remains invisible.

What is going on here, and how do I fix it?

Thanks!

Answer 1

Answer by Dr-Nick · May 06, 2015 at 09:56 AM

I found I was having a similar problem when I was instantiating ui prefabs during an Awake() method upon starting the Application. I found the solution was to do the prefab instantiation in the Start() method instead. I imagine in my case, the UI objects would have been created before the canvas was ready for them and thus remained invisible during the application.

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TheLagbringer · Jul 20, 2015 at 10:29 AM 3

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Thanks a lot ! This answer definitely placed me in a good direction and I eventually worked it out. However I am not 100% sure if Start/Awake made the difference. I tried some combinations and while those two methods yielded a slightly different behavior (weird) the true deal breaker for me was using

 prefabInstance.transform.SetParent(panel.transform, false);

ins$$anonymous$$d of

 prefabInstance.transform.SetParent(panel.transform);

Lisurc · Jan 01, 2016 at 01:24 PM 0

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Definitely the answer I was looking for. I'm getting used to placing my initialization stuff in the Awake() method but in case of dynamically adding UI elements to a Scrollview/Content I had to switch to the Start() method. Thanks!

Answer 2

Answer by MichalOp · Feb 22, 2015 at 08:43 PM

In editor you have to drop it to panel directly. In game, you should use Instantiate (yourPrefab,false); to instantiate UI elements and assign it to your panel.

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Answer 3

Answer by KazYamof · Jul 20, 2015 at 11:02 AM

All UI Components has to be children of a Canvas to be visible.

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Answer 4

Answer by Michael_Berna · Oct 04, 2021 at 03:31 PM

Somehow, mine got a scale of zero when it instantiated and I didn't notice it. That may be worth checking.

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4.6 Newly Instantiated UI Prefabs Are Not Visible?

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